Envelop



J. WISKL ENVELOP. APPLICATION FILED IAN. 9, 1919.

Patented July 27, 1920.

2 SHEETS-SHEET 1.

J. WISKI.

ENVELOP.

APPLICATION FILED JANJQ, 1919.

Patented July 27, 1920.

2 SHEETS-SHEET 2.

UNITED v STATES PATENT OFFICE.

osnrrrwrsrrr, or MILWAUKEE, Wisconsin, ASSIGNOR or ONE-HALF To JOSEPHoIiEsIAK, or MILWAUKEE, WISCONSIN.

ENVELOP.

To all whom it may concern: I

Be it known that I, JOSEPH 181-11, a citizen of Russia, residing atMilwaukee, in the county of .Milwaukee. andState of Viscousin, haveinvented certain new and useful Improvements in ;Envelops, of which thefollowing is a specification.

The primary object of the invention is the provision of an envelop whichcan notbe opened after being sealed without detecting the fact that thesame has been tampered with, any act of opening the envelop alsorequiring mutilation or removal of the postage stamp positioned thereon.

A further object of the invention is to provide a safety envelop inwhich the postage stamp when applied constitutes the final sealing meansof the envelop so that to obtain access to the contents of the enveloprequires either the removal or destruction of the Government postagestamp found in the usual position upon the front side of the structure.

With these general objects in view the invention it will be seen is bothsimple and easy to manufacture being formed in the manner hereinafterdescribed in connection with the accompanying drawings and in which likedesignating characters refer to corresponding parts throughout theseveral views.

In the drawings,

Figure 1 is a plan view of the blank of which the envelop is formedillustrated in its open position,

Fig. 2 is a view of the blank with the end flap secured folded, aportion of the blank being cut away.

Fig. 3 illustrates a further step in folding the blank, showing the reartop flap folded.

a shows the rear bottom flap folded and secured in position.

Fig. is a front elevation of the folded envebp ready for the finaladhesive securing of the rear bottom flap member.

Fig. 6 is a view similar to Fig. with the envelop completely secured inits closed position, the securing position of the postage stamp beingindicated by dotted lines, and

Fig. 7 is a perspective view of the locking connector for the end flaps.

My form of envelop consists of a blank 10 having a rectangular bodyportion 11, the opposite ends of which carry end flaps 12 for foldinginwardly upon the lines 13 into Specification of Letters Patent.Patented J 1y 2'7, 192(),

Application filed January 9, '1919. Serial No. 270,311.

overlapping relations. A pair of receiving slits 14: is providedadjacent the free end of each of the flaps 12 which are brought intoaline'ment with each other when the flaps are overlapped. for thelocking reception of a wedge-shaped member or key' 15 as illustrated inFig. 2 of the drawing. V

A rear top flap 16 substantially triangular inform is provided upon theupper edge of the body 11 adapted for folding upon the line 17 foroverlying thefolded end flaps 12 and for-sealing thereon by means. ofthe marginal adhesive 18, such folded position of the flap 16 beingillustrated in Fig. 3 of the drawings. A rear bottom flap 19 of generaltriangular form is carried by the body 11 opposite the flap 16, beingfoldable upon said body at the line 20 and at which times the marginaladhesive 21 upon the inner side of the flap 19 will be secured to theend flaps 12. The missive will be inserted in the envelop prior to theclosing of the bottom flap 19 and when the envelop appears asillustrated in Fig. -3, of the drawings, although the missive may beinserted if desired prior to the sealing of the top flap 16 and when theenvelop is arranged as shown in Fig. 2.

A neck 22 projects from the free end of the flap 19 provided with arectangular opening 23 through whicha locking tongue 24 at the free endof the flap 16 may project for threading through spaced slits 25 in theneck 22 and beneath a keeper strip 26 positioned between the slit 25.Arcuate arms 27 extend from the opposite outer corners of the neck 22one of which arms is adapted to be threaded through slits 28 in the reartop flap 16 adjacent one upper corner of the envelop at the rear sidethereof. The arms 9 27 have parallel terminal portions 29 adapted to bebrought over the upper edge of the envelop for folding down upon thefront or addressed side thereof. One of these terminal portions 29 isadapted to be projected through parallel slots 30 at the upper righthand corner of the front of the envelop at a point usually designatedfor the application of a Government postage stamp. 'ihe arms 27 andterminal portions 29 are provided with a suitable adhesive for securingthe same upon the contacted portions of the rear top flat 16 and thebody 11 of the blank as is herein described.

hen the missive is positioned Within the envelop and the flaps foldedand sealed as described, a postage stamp 31 indicated by dotted lines inF 6 of the drawings, is

V adhesively secured over the slots 30 and the terminal portion 29 ofone of the arms 27 so that the flap 19 is secured over the top flap aletter sealed in the ordinary manner so that my envelop al'l'ords great,protection against tampering, the slitted arrangements 26, 28 and 30being further means by which the opening of the envelop without mutilation is, renderedsubstantially impossible.

hat I claim as new is L- 7' An envelop comprising a rectangular bodyportion having slits in one corner thereof, an end flap formed on theopposite side edges of said body and each provided with a pair of spacedslits, securing means arranged in said slits whenthe flaps are foldedtriangular-shaped flap formed on one edge of Said y a d Prov ded a tsapex with a locking tongue, said flap also having slits in one cornerthereof, a trian ular-shaped rear bottom flap formed on said body at anedge remote from said rear top flap, a reduced neck portion formed fromthe apex of said rear bottom flap, said neck portion having spaced slitstherein, at the point of juncture of said neck with said flap, andoppositely extending curved:- arms formed on the free end of said neckand having adhesive on one side thereof, said arms adapted when infolded position to beextended through the slits in the body and rear topflap said look ing tongue extended through the slits of said neckwhensaid rear top and bottom flaps are folded against'said body,for'holda ing said flaps against separation.

In testimony. whereof I afiix my signature.

7 JOSEPH WISKI.

